diff --git a/static/build.html b/static/build.html
index e559992e..2baead0f 100644
--- a/static/build.html
+++ b/static/build.html
@@ -237,6 +237,8 @@
                         <li>freetype2, fontconfig and any OpenType/TrueType font (such as DejaVu
                             but anything works) for OpenJDK despite it being a headless variant
                             without GUI support</li>
+                        <li>hostname (inetutils) is used for detecting namespace support for build
+                            sandboxing</li>
                         <li>ncurses5 (provided by the source tree for some tools but not others)</li>
                         <li>openssl</li>
                         <li>rsync</li>